LIUQiang.Application and Operational Performance of Biological Combined System in Wastewater Treatment Plant Transformation[J].China Water & Wastewater,2022,38(6):81-85.
Application and Operational Performance of Biological Combined System in Wastewater Treatment Plant Transformation
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第6期
Page:
81-85
Column:
Date of publication:
2022-03-17
- Abstract:
- The original process of a WWTP in Dalian was constant water level SBR (CWSBR) with a design scale of 3×104 m3/d, and the effluent quality was required to meet first level A discharge standard. In recent years, pollutant concentrations in the influent are obviously higher than the original design values, resulting in the actual effluent quality cannot meet the discharge standard. Therefore, biological combined system (BIOCOS) and advanced treatment process of high-density sedimentation tank were adopted in the reconstruction project, and the biochemical tank of the original CWSBR was divided into groups without suspending the operation. BIOCOS is a modified activated sludge system that utilizes endogenous denitrification technology to achieve efficient nitrogen removal by optimizing the hydraulic models. Each BIOCOS system consists of a P tank (anaerobic tank), a B tank (anoxic/aerobic tank) and two SU tanks (sedimentation circulating tank). The actual operation of more than one year after the transformation shows that the effluent quality is stable and superior to first level A discharge standard.
Last Update:
2022-03-17